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Jake Gyllenhaal looked hot to trot as he made his way through the Big Apple in sunglasses, jeans, a T-shirt ... and a backpack. Do you think the "Prisoners" actor was popular in school? (4/26/13) Credit: Splash News

Stars Sport Back-to-School Must-Have: Backpacks!

It's time to pack up the books and head back to school! From the looks of it, some celebs already have the most important accessory – a backpack!